Bug 648666 (CVE-2010-4079) - CVE-2010-4079 kernel: drivers/video/ivtv/ivtvfb.c: reading uninitialized stack memory
Summary: CVE-2010-4079 kernel: drivers/video/ivtv/ivtvfb.c: reading uninitialized stac...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2010-4079
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 648831 648832 648833
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-11-01 21:24 UTC by Petr Matousek
Modified: 2023-05-11 15:31 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-10-19 09:16:38 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0958 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2010-12-08 19:08:55 UTC
Red Hat Product Errata RHSA-2011:0007 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2011-01-11 19:44:55 UTC

Description Petr Matousek 2010-11-01 21:24:16 UTC 
Description of problem:
The FBIOGET_VBLANK device ioctl in ivtvfb.c allows unprivileged users to read 16 bytes of uninitialized stack memory, because the 'reserved' member of the fb_vblank struct declared on the stack is not altered or zeroed before being copied back to the user.

Reference:
http://www.openwall.com/lists/oss-security/2010/10/06/6
http://lkml.org/lkml/2010/9/15/393


Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.
Comment 2 Petr Matousek 2010-11-02 11:10:29 UTC 
Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 3, 4, and 5 as they did not include support for the Conexant's
CX23415/CX23416 codec chip.
Comment 3 Eugene Teo (Security Response) 2010-11-04 07:40:53 UTC 
Upstream commit:
http://git.kernel.org/linus/405707985594169cfd0b1d97d29fcb4b4c6f2ac9
Comment 4 errata-xmlrpc 2010-12-08 19:10:03 UTC 
This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2010:0958 https://rhn.redhat.com/errata/RHSA-2010-0958.html
Comment 5 errata-xmlrpc 2011-01-11 19:46:32 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0007 https://rhn.redhat.com/errata/RHSA-2011-0007.html
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